Quantitative Aptitude - Arithmetic Ability Questions

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son . The present age of Dr. Pandey's son is

In what ratio rice costing Rs 14/kg mixed with another rice costing Rs 11/kg to get the mixture costing Rs 11.6/kg?

What is the value of √[(1 - sinA)/(1 + sinA)]?

If (6x ­- 5) = (4x + 7), then the numerical value of (x + 1)3  is

If sec2θ+tan2θ=3, then sec4θ-tan4θ =

What is the value of √[(1 ­- cosA)/(1 + cosA)]?

What is the slope of the line parallel to the line passing through the points (-2, -1) and (4, -3)?

Select the odd number from the given alternatives.